PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-01:27:20
G02     48.4           42.0                9.1 +/-    0.80      12.8 +/-    0.80  0.040 / 0.050
G05     88.7           68.5               11.7 +/-    0.70      12.5 +/-    0.70  0.030 / 0.040
G12     187.6          47.9               14.8 +/-    1.43      19.2 +/-    1.43  0.030 / 0.030
G25     264.9          58.0               12.2 +/-    1.14      14.1 +/-    1.14  0.030 / 0.030
G29     318.5          40.7               10.4 +/-    1.91      14.9 +/-    1.91  0.040 / 0.040